package com.lagou.edu.service.impl;

import com.lagou.edu.stereotype.Autowired;
import com.lagou.edu.stereotype.Service;
import com.lagou.edu.dao.AccountDao;
import com.lagou.edu.pojo.Account;
import com.lagou.edu.service.TransferService;

/**
 * @author chenx
 */
@Service
public class TransferServiceImpl implements TransferService {
//    private AccountDao accountDao = new JdbcAccountDaoImpl();
    @Autowired
    private AccountDao accountDao;

  //提供set方法，供外部注入dao层实现类（DI?）
//    public void setAccountDao(AccountDao accountDao) {
//        this.accountDao = accountDao;
//    }

    @Override
    public void transfer(String fromCardNo, String toCardNo, int money)
            throws Exception {
        Account from = accountDao.queryAccountByCardNo(fromCardNo);
        int c = 1/0;
        Account to = accountDao.queryAccountByCardNo(toCardNo);
        from.setMoney(from.getMoney()-money);
        to.setMoney(to.getMoney()+money);
        accountDao.updateAccountByCardNo(from);
        accountDao.updateAccountByCardNo(to);
    }
}
